[en] This paper describes the computing models and the tools developed within the Lhc collaborations to realize the offline data handling at Lhc. In order to reconstruct and to analyze Lhc data the experiments will exploit the Grid distributed computing resources spread over the world. Different analysis software tools have been developed with the aim of providing user friendly interfaces in order to analyze several Peta bytes of data that will be collected at Lhc. The paper presents an overview of strategies and the distributed data analysis tools employed by Atlas, CMS, and Lhc b.